Mechanical and failure properties of rigid polyurethane foam under tension

... model the behaviour of rigid polyurethane foam under tension and which directly relates the overall mechanical properties of rigid polyurethane foam with the mechanical behaviour of the constituent ... focuses on the tensile mechanical properties of rigid polyurethane foam and establishment of an appropriate cell model The mechanical and struc...

Ngày tải lên: 14/09/2015, 12:24

... following this 10 1.2 Solder alloys and solder joints 1.2.1 Solder alloys and rate-dependent mechanical properties (1) Types of solder alloys and the trend to lead-free soldering Solders are commonly ... properties of solder joints 153 4.2.1 Combined loading on solder joints 153 4.2.2 Analysis of solder joint forces under different loading modes 159 4.2.3...

Ngày tải lên: 11/09/2015, 09:58

... response calculations to study the effect of uniaxial tensile stress along the c axis on the mechanical and piezoelectric properties of short-period BTO/PTO superlattice We show the mechanical properties ... that the superlattice under the loading of uniaxial tensile stress along the c axis becomes soft along the nonpolar axes To illustrat...

Ngày tải lên: 22/06/2014, 00:20

... matrix and SBS gels were mixed with NR at a given concentration, to investigate their effect on the morphology, mechanical, dynamic mechanical and thermal properties of raw SBR and NR Morphology of ... diffusion of these curing agents during prevulcanization and hence higher amount of crosslinking The effect of sulfur crosslinking is also very pronounced on the m...

Ngày tải lên: 22/06/2014, 01:20

... agent concentration on number of cells per unit volume Average Cell Size (mm) 1.5 0.5 10 12 Blowing Agent Concentration (phr) Figure 3: Effect of blowing agent concentration on average cell size ... Relationship between force and displacement at different blowing agent concentrations Table 3: Effect of blowing agent concentration on the absorbed ene...

Ngày tải lên: 07/08/2014, 14:20

... Morphology of the MWCNTs Figure 5(a–c) shows the SEM micrographs of the MWCNTs of the as-produced and the functionalized tubes As seen from Fig 5a, the raw MWCNTs are produced in the form of agglomerated ... amide -MWCNTs/ polyimide and that of acid -MWCNTs/ polyimide composites are almost 123 One unique property of the MWCNTs is their electrical...

Ngày tải lên: 22/06/2014, 01:20

... CTBN and the EP, and to investigate the thermal, mechanical, and morphological properties of the modified EP EXPERIMENTAL 2.1 Materials The clear epoxy 331, with an epoxide equivalent weight of ... effect of CTBN content and different testing speeds on the KIC of the EPs Properties of Modified Epoxy Resin In order to correlate the mechanical properties...

Ngày tải lên: 07/08/2014, 14:20

... February 2002 Vol No Kondo et al secretion or absorption of water Pulmonary epithelial ion transport systems are important in the modulation of the ionic content and volume of periciliary fluid, ... respiratory failure and MV, many factors can potentially impair MCT, such as ventilation with a high concentration of oxygen, the activation of inflammatory mediator systems, colon...

Ngày tải lên: 12/08/2014, 18:21

... Restrained Shrinkage cracking parameters Fig 1.2 Factors affecting shrinkage cracking of concrete Mechanical and Deformational Properties, and Shrinkage Cracking Behaviour of Lightweight Concretes ... shrinkage rate @ cracking and age of cracking for LWAC 225 Fig 5.17 Relationship between shrinkage rate at cracking and age of cracking: Compar...

Ngày tải lên: 11/09/2015, 09:07

... addition of Co2+ ion content, which may be attributed to the ionic radii of constituent ions causing increase in lattice parameter and the densities of pure cobalt ferrite (5.29 g/cm3) and pure nickel ... temperature.These plots show that an increase in Co2+ doping yields monotonic increase in the saturation magnetization of Niferrite which may be due to the substit...

Ngày tải lên: 13/02/2014, 04:20

... that MCPIP regulates the amount of IL-1b mRNA Involvement of PIN domain of MCPIP in the stability of IL-1b mRNA In order to find out whether the PIN domain in MCPIP is responsible for IL-1b mRNA ... interacting with MCPIP will clarify the dynamics and features of this protein Role of MCPIP in regulation of the endogenous IL-1b transcript level...

Ngày tải lên: 18/02/2014, 14:20

... suppress its protease inhibitory properties, we show that the antibacterial ⁄ fungicidal action of trappin-2 is independent of its antiprotease function Although we have not determined its exact ... that trappin-2, and to a lesser extent elafin, have broad antibacterial and antifungal properties that are independent of their antiprotease function and p...

Ngày tải lên: 18/02/2014, 17:20

... performing detailed kinetic studies of both AADH enzymes, we show that the recombinant enzyme is indistinguishable from the native AADH of A faecalis and benzylamine is a substrate during steady-state ... tryptophan tryptophylquinone as the redox prosthetic group in methylamine dehydrogenase Science 252, 817–824 Chistoserdov AY (2001) Cloning, sequencing and mutage...

Ngày tải lên: 19/02/2014, 07:20

... opistoporins (34%) and pandinin (31%) This means that there is a high conservation in amino acid sequence of the peptides in the venom of scorpions that belong to the same family, independent of the ... fit in the theory that amphipathicity, a-helicity and cationicity due to the presence of high amounts of lysine and arginine are the most important fac...

Ngày tải lên: 21/02/2014, 15:20